Just got a 570 eps and would like to get a set of Zillas. I can't do a clutch kit or other mods due to the 5 year warranty. From what I've read Zillas run short, so should I go with 26" tires for stock height and could I go 27" with stock clutch? I do want to keep the tires under the fenders. Don't want to be covered every time I ride. I wouldn't mind fender flares and go wider but I can't find any. Don't want 25" tires due to tread depth. Any suggestions. Mostly used in mud and trail.